Start getting ideas on what you will write about yourself within the poem. Think about what aspects of your personality make up your character as a whole, while taking notes of the most personal traits for inclusion in your written expression of yourself. As an example, if you are a sports fan, that alone might not be a deep enough trait to give your reader an idea as to who you really are. If you love sports, but are afraid of the ocean, heights or are infatuated with sunrises, it might be be a bit more insightful to include that information instead.
Write your name, followed by sentences based on your brainstorming, including words and phrases that can be later developed into full sentences as well. Writing them in the form of a question often influences the reader to think about what you are proposing, challenging them as they wait for your response to be given. Try to think of sentences that flow consistently, and ones that also guide the reader toward the point you are trying to make about yourself. As an example, you could make a list of these questions and answer them accordingly:
Who adores ...
Who loathes ...
Who believes ...
Who despises ...
Who anticipates ...
Who wonders about ...
Arrange the sentences, phrases and various ideas into a unified form. There are numerous ways to go about doing this. The sentences could just bring certain memories to your mind that stood out emotionally or build off each other until a new outlook is achieved after introspection.
Pick a title that sums up what you are trying to convey within the poem. You could decide to pick out the sentence or phrase from your poem that you feel to be the most expressive of your feelings or choose one that will have a double-meaning to the reader. A double-meaning title is commonly used in poetry titles. An example might be, "A Crashing Wave," which describes both a time when you were swept under by a wave in the ocean or the way you felt when you were overwhelmed by your emotions at some point.
Make sure that your autobiographical poem is proofread, paying close attention to the punctuation and grammar of the sentences contained within the text. This will keep the reader's attention focused on the mood or point you are trying to express, without them being distracted by the literary aspects of the piece instead.